There's an interesting correlation to information theory and compressibility. Someone did an analysis of pop lyrics[1] where they compressed the plaintext using

There's an interesting correlation to information theory and compressibility. Someone did an analysis of pop lyrics[1] where they compressed the plaintext using a lossless compression algorithm and determined that (as expected) many pop songs compress very well and are highly redundant. But taken another angle, this could also represent that we as human beings find lyrics which have high degrees of self-similarity with small amounts of variation to be pleasing to the ear, which tracks with what makes pop music (which must be singable and usually danceable to go viral) successful. [1] https://pudding.cool/2017/05/song-repetition/ https://pudding.cool/2017/05/song-repetition/